This gadget puts Amazon Alexa in your car—but does it work?

Amazon's Alexa voice assistant has made it easier than ever to add voice control to thousands of devices. It was only a matter of time before Alexa conquered the car. The new Garmin Speak is a $150 device that integrates Alexa voice recognition into a small, windshield-mounted speaker and display. By blending the ease of talking to Alexa with Garmin's longstanding expertise with in-car navigation, it promises to be simpler than a touchscreen. I spent a month driving with it in both old and new cars to find out.